Silver drachm of Phraataces ("Little Phraates") and Musa (c. 2 BC-4 AD).
At the peace negotiations of 20 BC, Phraates IV received the concubine Musa as a gift from Rome. He was eventually murdered by Musa and their son, Phraataces. The mother-son conspirators reportedly married and ruled Parthia jointly, as shown on this coin. Horrified Roman sources assert that the pair was killed because of this marriage; however, this was not unusual amongst Parthian Zoroastrians. More likely, Musa and Phraataces were perceived to have lost the khvarnah following territorial losses to Rome.
© Trustees of the British Museum